A float type liquid level meter and a production process thereof

Abstract

The application discloses a floating ball type liquid level meter and a production process thereof, and relates to the technical field of floating ball type liquid level meters and production thereof. The liquid level meter comprises a steel pipe, end flanges are arranged at both ends of the steel pipe, a strip-shaped observation groove is formed on the front and back sides of the steel pipe, a transparent four-fluorine lining pipe is sleeved on the steel pipe, and a floating ball is slidably connected in the lining pipe. The transparent four-fluorine lining pipe has good self-lubricating performance and a smooth inner wall, so that the long-term movement of the floating ball is ensured, and the problems of insufficient rigidity, easy scaling and easy jamming of the floating ball of the existing liquid level pipe are solved. In the production process, a plurality of processes such as clamping of the steel pipe, insertion of the lining pipe, automatic loading of the floating ball and welding of the flanges are continuously completed on the same equipment by means of integrated assembly equipment, and the automatic assembly and welding are realized without the need of multiple clamping and transfer. The application has the advantages of high structural strength, convenient observation, reliable movement of the floating ball, high production efficiency, good assembly precision and suitability for batch and standardized production.

Description

Technical Field

[0001] This invention relates to the field of float-type liquid level gauges and their manufacturing technology, specifically a float-type liquid level gauge and its manufacturing process. Background Technology

[0002] A float-type level gauge is a liquid level measuring instrument based on Archimedes' principle of buoyancy, widely used in industries such as petroleum, chemical, water treatment, and food. Its basic structure includes a steel pipe, a float, and end flanges. The liquid level is monitored by the rise and fall of the float. This type of instrument has advantages such as simple structure, convenient installation, and high reliability, and is suitable for measuring the liquid level of high-temperature, high-pressure, viscous, and corrosive media.

[0003] In the prior art, there is a Chinese invention patent with publication number CN101988847A entitled "A Liquid Level Display Device on a Tank". This device achieves intuitive observation of the liquid level in the tank by longitudinally setting a transparent liquid level tube on the outer wall of the tank body, setting an acid and alkali resistant float ball inside the liquid level tube, and setting a liquid level scale bar on the outer wall of the liquid level tube. This structure solves to a certain extent the problem that electronic liquid level gauges cannot display the liquid level when power is off or malfunctions, and improves the convenience and reliability of observation.

[0004] However, the aforementioned existing technologies still have significant shortcomings. First, the level gauge is typically made of ordinary transparent plastic or glass, with thin walls and insufficient overall rigidity. It is prone to deformation or even breakage when subjected to external mechanical impacts or internal pressure fluctuations, making it unsuitable for high-pressure conditions or harsh industrial environments. Second, after prolonged use, the inner wall of the level gauge is prone to scaling due to impurities, scale, or media residue in the liquid, increasing surface roughness and affecting the free sliding of the float. More importantly, the existing level gauge lacks self-lubricating properties; the float relies entirely on the lubrication of the liquid medium for its up-and-down movement. If the liquid itself has poor lubricity or the inside of the level gauge is dry or scaled, the float is prone to jamming, sluggish movement, or even complete seizure, severely affecting the accuracy and reliability of level measurement and posing significant difficulties for equipment maintenance and cleaning.

[0005] Regarding the manufacturing process, existing technologies, including the aforementioned patents, also have shortcomings. In traditional production processes, steps such as inserting the inner liner, installing the float, and welding the flange are mostly completed manually or with scattered equipment, requiring multiple transfers and re-clampings between different workstations, resulting in long production cycles and low efficiency. Due to the lack of integrated assembly equipment, manual operation is prone to problems such as incomplete insertion of the inner liner, missing or stuck floats, and inaccurate flange welding alignment, affecting product consistency and reliability. In addition, existing processes lack linkage control for welding, positioning, and assembly, making it difficult to achieve automated connection of multiple processes, increasing labor costs and operational complexity, and hindering mass production and quality control.

[0006] Therefore, existing float-type level gauges suffer from structural design flaws such as insufficient rigidity of the level tube, easy scaling on the inner wall, and lack of self-lubrication, leading to unsmooth float movement and reduced measurement reliability. Furthermore, their manufacturing process suffers from dispersed processes, low automation, and difficulty in guaranteeing assembly precision. In light of this, there is an urgent need to provide a float-type level gauge with a more rational structure, smooth inner wall, self-lubricating properties, and ease of automated production, along with its manufacturing process, to improve product performance, measurement reliability, and production efficiency. Summary of the Invention

[0007] The purpose of this invention is to provide a float-type liquid level gauge and its manufacturing process in order to solve the technical problems in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a float-type level gauge, comprising a steel pipe, wherein end flanges are fixedly connected to the top and bottom ends of the steel pipe, and strip-shaped observation grooves are provided on the front and rear sides of the steel pipe, wherein a transparent PTFE liner is fitted onto the inner wall of the steel pipe, and a float is slidably connected to the inner wall of the transparent PTFE liner; and level markings are provided on the side wall of the steel pipe near the strip-shaped observation groove or on the transparent PTFE liner inside the strip-shaped observation groove.

[0009] A manufacturing process for a float-type liquid level gauge, the specific steps of which are as follows:

[0010] Step 1: Preparation and processing; Select carbon steel or stainless steel that meets the pressure vessel connection standards as the outer steel pipe. The length of the steel pipe is customized according to the preset size. Use wire cutting or milling process to open longitudinal strip observation grooves on the front and back sides of the steel pipe.

[0011] Step 2: Inner liner forming; The transparent PTFE inner liner is cut and customized according to the preset size to ensure that its inner wall is smooth and highly transparent;

[0012] Step 3: Assembly; Using assembly equipment, insert the transparent PTFE-lined tube into the steel pipe, place the float into the transparent PTFE-lined tube, and weld end flanges to both ends of the steel pipe;

[0013] Step 4: Testing; After assembly, conduct a simulated liquid level test: inject clean water, observe whether the float can move freely up and down throughout the entire process, and clearly identify its position from a distance. Once it is confirmed that there is no jamming or leakage, the finished product is obtained.

[0014] As a further embodiment of the present invention: the assembly equipment in step three includes an assembly platform, on which the float-type level gauge is assembled by an assembly mechanism. The end flanges are welded to both ends of the steel pipe by a welding mechanism. The assembly mechanism includes a first motor, which is installed at the bottom of the assembly platform. The output end of the first motor is connected to a rotating shaft. A rotating frame is fixedly connected to the top of the rotating shaft. A second motor is installed on one side of the rotating frame. The output end of the second motor is connected to a first threaded rod. Clamping plates are symmetrically slidably connected to the inner wall of the rotating frame. The first threaded rod passes through the two clamping plates. Two rotating wheels are rotatably connected to the outer wall of the clamping plates. A third motor is installed at the bottom of one of the clamping plates. The output end of the third motor is connected to the rotating wheel.

[0015] As a further embodiment of the present invention: the assembly mechanism further includes a support base, one end of the assembly platform is fixedly connected to the support base, the top end of the support base is fixedly connected to a positioning frame, the outer wall of the support base is slidably connected to a displacement plate, the top end of the displacement plate is fixedly connected to an insertion rod, the top end of the assembly platform is equipped with a fourth motor, the output end of the fourth motor is connected to a second threaded rod, the second threaded rod passes through the displacement plate, the top end of the assembly platform is provided with an insertion hole above the insertion rod, one side of the assembly platform is fixedly connected to a fixed frame, the top end of the fixed frame is provided with a vertical groove, the inside of the fixed frame is slidably connected to a movable frame, a first spring is connected between the movable frame and the fixed frame, one end of the movable frame extends into the inner cavity of the vertical groove, the other end of the movable frame extends out of the fixed frame, the inside of the fixed frame is rotatably connected to the top end of the movable frame, and the inside of the fixed frame is slidably connected to the top end of the spur gear.

[0016] As a further embodiment of the present invention: the welding mechanism includes a mounting frame, which is fixedly connected to the end of the assembly table away from the support base. A hydraulic cylinder is mounted on the outer wall of the mounting frame, and a movable seat is connected to the output end of the hydraulic cylinder. A fifth motor is mounted on the top of the movable seat, and a third threaded rod is connected to the output end of the fifth motor. A displacement frame is symmetrically slidably connected inside the movable seat. A welding torch is mounted on one end of the displacement frame, and the third threaded rod passes through the displacement frame. Mounting seats are symmetrically fixedly connected to both ends of the mounting frame. A sliding groove is provided on the side of each mounting seat that is close to each other. A limit plate is fixedly connected to the outer wall of the mounting seat. A locking block extending into the inner cavity of the sliding groove is slidably connected inside the mounting seat. A second spring is connected between the locking block and the mounting seat. A pusher is slidably connected inside the mounting frame and the mounting seat. The pusher passes through the locking block. A push plate is fixedly connected to one end of the pusher. The other end of the pusher extends out of the mounting frame. A third spring is connected between the pusher and the mounting frame.

[0017] As a further embodiment of the present invention: the outer wall of the clamping plate is in contact with the inner wall of the rotating frame, the outer wall of the clamping plate is provided with a first threaded hole, and the outer wall of the first threaded rod is symmetrically provided with a first external thread, the external thread matching the first threaded hole.

[0018] As a further embodiment of the present invention: the inner wall of the insertion hole is fitted with the outer wall of the insertion rod, the outer wall of the displacement plate is provided with a second threaded hole, the second threaded hole is matched with the second threaded rod, and the outer wall of the transparent PTFE inner liner is fitted with the inner wall of the insertion hole.

[0019] As a further embodiment of the present invention: the top end of the movable frame and the bottom end of the baffle are both provided with toothed grooves, the toothed grooves mesh with the spur gear, and a semi-circular surface is provided at one end of the movable frame extending from the fixed frame.

[0020] As a further embodiment of the present invention: the outer wall of the displacement frame is provided with a third threaded hole, and the outer wall of the third threaded rod is symmetrically provided with a second external thread, the second external thread matching the third threaded hole.

[0021] As a further embodiment of the present invention: the inner wall of one end of the slide groove is in contact with the outer wall of the end flange, the end of the locking block extending into the inner cavity of the slide groove is provided with a first inclined surface, the side of the locking block is provided with a second inclined surface, and the push plate is in contact with the second inclined surface.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention uses a steel pipe as the outer pressure-bearing shell, which has excellent mechanical strength and rigidity, effectively resisting external impacts and internal pressure fluctuations. It is suitable for high-pressure, high-temperature, and harsh industrial environments, significantly improving the structural reliability and service life of the level gauge. Simultaneously, strip-shaped observation slots are opened on both the front and rear sides of the steel pipe, allowing operators to observe the float position from multiple angles, avoiding the limited viewing angle of traditional single-sided observation windows, and improving the convenience and applicability of observation.

[0024] 2. This invention incorporates a transparent PTFE liner inside a steel pipe. The transparent PTFE material itself possesses excellent transparency and smoothness, ensuring minimal resistance when the float moves within the pipe. Unlike conventional level gauges in existing technologies, which are prone to scaling and lack self-lubrication, the transparent PTFE liner exhibits excellent self-lubricating properties. Even after long-term use, the inner wall remains smooth, preventing scale or impurities from adhering, effectively avoiding float jamming and sluggish movement, and ensuring the sensitivity and reliability of level measurement. Furthermore, the transparent PTFE liner fits tightly against the inner wall of the steel pipe, providing both the rigid support of the steel pipe and leveraging its own transparency and self-lubricating properties, achieving a perfect balance between structural strength and performance.

[0025] 3. The present invention also provides liquid level scales on the side wall of the steel pipe near the strip observation tank or on the transparent PTFE liner tube inside the strip observation tank. The scale positions are reasonably designed and are not easily worn or contaminated. Operators can clearly and accurately read the liquid level height from the outside, further improving the convenience of use and the accuracy of reading.

[0026] 4. The production process provided by this invention integrates multiple processes, such as steel pipe clamping, insertion of transparent PTFE inner liner, automatic float loading, and end flange welding, into a single, continuous process on a single piece of equipment through an integrated assembly table and automated tooling. Throughout the production process, the steel pipe does not require repeated disassembly, re-clamping, or transfer between different workstations, significantly shortening the production cycle and improving production efficiency. Simultaneously, the mechanical insertion of the inner liner using an insertion rod, the automatic deployment of the float by a linkage mechanism, and the automatic welding with the rotation of the steel pipe using a welding torch effectively replace manual operation, avoiding problems such as incomplete inner liner insertion, missing or stuck floats, and inaccurate flange welding alignment, thus greatly improving assembly accuracy and product consistency.

[0027] 5. This assembly equipment arranges the insertion holes, vertical slots, and slides along the circular motion trajectory of the steel pipe. A rotating frame drives the steel pipe sequentially to the corresponding positions in each process step. The compact structure and high integration reduce the equipment's footprint and investment costs. The entire production process can be semi-automatic or fully automatic through the linkage control of motors and hydraulic cylinders, reducing manual intervention and labor intensity. It solves the problems of dispersed processes, multiple clamping operations, and low automation in existing technologies, facilitating mass production and standardization in industrial manufacturing. It has good practical value and promising prospects for widespread application. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the float-type level gauge described in this invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of the steel pipe of the float-type level gauge described in this invention;

[0030] Figure 3 This is a schematic diagram of the assembly equipment described in this invention;

[0031] Figure 4 This is a schematic diagram of the rotating frame of the assembly equipment described in this invention;

[0032] Figure 5 This is a schematic diagram of the internal structure of the support base of the assembly equipment described in this invention;

[0033] Figure 6 This is a schematic diagram of the internal structure of the mounting frame of the assembly equipment described in this invention;

[0034] Figure 7 This is a schematic diagram of the mounting frame of the assembly equipment described in this invention;

[0035] Figure 8 This is a schematic diagram of the internal structure of the mounting frame of the assembly equipment described in this invention;

[0036] Figure 9 This is a schematic diagram of the card block structure of the assembly equipment described in this invention.

[0037] In the diagram: 1. Steel pipe; 2. End flange; 3. Strip observation trough; 4. Transparent PTFE liner; 5. Float; 6. Assembly platform; 7. Assembly mechanism; 701. First motor; 702. Rotating shaft; 703. Rotating frame; 704. Second motor; 705. First threaded rod; 706. Clamping plate; 707. Rotating wheel; 708. Third motor; 709. Support base; 710. Positioning frame; 711. Fourth motor; 712. Second threaded rod; 713. Displacement plate; 714. Insertion rod; 715. Insertion hole 716. Fixed frame; 717. Vertical groove; 718. Movable frame; 719. First spring; 720. Spur gear; 721. Baffle; 8. Welding mechanism; 801. Mounting frame; 802. Hydraulic cylinder; 803. Movable seat; 804. Fifth motor; 805. Third threaded rod; 806. Displacement frame; 807. Welding torch; 808. Mounting seat; 809. Slide groove; 810. Limiting plate; 811. Locking block; 812. Second spring; 813. Push frame; 814. Third spring; 815. Push plate. Detailed Implementation

[0038] The present invention will now be described and illustrated in detail with reference to the embodiments.

[0039] Example 1

[0040] like Figures 1-9 In this embodiment of the invention, a float-type level gauge includes a steel pipe 1, with end flanges 2 fixedly connected to both the top and bottom ends of the steel pipe 1. Strip-shaped observation grooves 3 are provided on both the front and rear sides of the steel pipe 1. A transparent PTFE inner liner tube 4 is sleeved on the inner wall of the steel pipe 1, and a float 5 is slidably connected to the inner wall of the transparent PTFE inner liner tube 4. Level markings are provided on the side wall of the steel pipe near the strip-shaped observation groove or on the transparent PTFE inner liner tube inside the strip-shaped observation groove.

[0041] When using the float-type level gauge described in this invention, the float should be made of a bright, easily visible color, such as bright red, so that its position can be clearly observed from a distance. The upper and lower ends of the level gauge are installed on the outer wall of the container via bent pipe joints (if necessary, switch valves can also be installed at the upper and lower ends to control the connection between the float-type level gauge and the container). Utilizing the principle of communicating vessels, the position of the float synchronously indicates the liquid level inside the container. Operators can easily read the liquid level value simply by observing the scale at the location of the float.

[0042] A manufacturing process for a float-type liquid level gauge, the specific steps of which are as follows:

[0043] Step 1: Preparation and processing; Select carbon steel or stainless steel that meets the pressure vessel connection standards as the outer steel pipe 1. The length of the steel pipe 1 is customized according to the preset size. Use wire cutting or milling process to open longitudinal strip observation grooves 3 on the front and back sides of the steel pipe 1.

[0044] Step 2: Inner liner forming; the transparent PTFE inner liner 4 is cut and customized according to the preset size to ensure that its inner wall is smooth and highly transparent;

[0045] Step 3: Assembly; Using the assembly equipment, insert the transparent PTFE inner liner tube 4 into the steel pipe 1, place the float ball 5 into the transparent PTFE inner liner tube 4, and weld end flanges 2 at both ends of the steel pipe 1.

[0046] Step 4: Testing; After assembly, conduct a simulated liquid level test: inject clean water and observe whether the float 5 can move freely up and down throughout the entire process, and clearly identify its position from a distance. Once it is confirmed that there is no jamming or leakage, the finished product is obtained.

[0047] The assembly equipment in step three includes an assembly platform 6, on which the float-type level gauge is assembled by an assembly mechanism 7, and the end flange 2 is welded to both ends of the steel pipe 1 by a welding mechanism 8.

[0048] The assembly mechanism 7 includes a first motor 701, which is mounted on the bottom of the assembly platform 6. The output end of the first motor 701 is connected to a rotating shaft 702. A rotating frame 703 is fixedly connected to the top of the rotating shaft 702. A second motor 704 is mounted on one side of the rotating frame 703. A first threaded rod 705 is connected to the output end of the second motor 704. Clamping plates 706 are symmetrically slidably connected to the inner wall of the rotating frame 703. The first threaded rod 705 passes through the two clamping plates 706. Two rotating wheels 707 are rotatably connected to the outer wall of the clamping plates 706. A third motor 708 is mounted on the bottom of one clamping plate 706. The output end of the third motor 708 is connected to the rotating wheel 707.

[0049] The assembly mechanism 7 also includes a support base 709. One end of the assembly platform 6 is fixedly connected to the support base 709, and the top of the support base 709 is fixedly connected to a positioning frame 710. A displacement plate 713 is slidably connected to the outer wall of the support base 709, and a plug rod 714 is fixedly connected to the top of the displacement plate 713. A fourth motor 711 is mounted on the top of the assembly platform 6, and the output end of the fourth motor 711 is connected to a second threaded rod 712, which passes through the displacement plate 713. An insertion hole 715 is provided on the top of the assembly platform 6 above the plug rod 714. A fixed frame 716 is fixedly connected to one side of 6. A vertical groove 717 is provided at the top of the fixed frame 716. A movable frame 718 is slidably connected inside the fixed frame 716. A first spring 719 is connected between the movable frame 718 and the fixed frame 716. One end of the movable frame 718 extends into the inner cavity of the vertical groove 717, and the other end of the movable frame 718 extends out of the fixed frame 716. A spur gear 720 is rotatably connected inside the fixed frame 716 at the top of the movable frame 718. A baffle 721 is slidably connected inside the fixed frame 716 at the top of the spur gear 720.

[0050] In this embodiment: when assembling the float-type level gauge, the steel pipe 1 is moved to the top of the assembly platform 6 and positioned between the two clamps 706. The transparent PTFE inner liner tube 4 is inserted into the insertion hole 715 so that the bottom end of the transparent PTFE inner liner tube 4 contacts the top end of the insertion rod 714. The float 5 is placed into the vertical groove 717.

[0051] Start the second motor 704. The second motor 704 drives the first threaded rod 705 to rotate. The rotation of the first threaded rod 705 drives the two clamping plates 706 to move in opposite directions. The movement of the clamping plates 706 drives the rotating wheels 707 to move. The four rotating wheels 707 clamp and position the steel pipe 1. At this time, the third motor 708 can be started to drive the rotating wheels 707 to rotate. The rotation of the rotating wheels 707 drives the steel pipe 1 to rotate.

[0052] The first motor 701 drives the rotating shaft 702 to rotate, which in turn causes the steel pipe 1 to move in a circular motion until it reaches the top of the insertion hole 715. Then, the fourth motor 711 is started, which drives the second threaded rod 712 to rotate. The rotation of the second threaded rod 712 causes the displacement plate 713 to move, which in turn pushes the insertion rod 714 to move. The displacement of the insertion rod 714 pushes the transparent PTFE inner liner tube 4 into the steel pipe 1 until the insertion rod 714 is fully inserted into the insertion hole 715, thus ensuring that the transparent PTFE inner liner tube 4 is fully inside the steel pipe 1.

[0053] Then, the rotating shaft 702 continues to rotate, driving the steel pipe 1 to continue to move. The steel pipe 1 moves to the bottom of the vertical groove 717. At this time, the steel pipe 1 comes into contact with the movable frame 718, pushing the movable frame 718 to move and squeezing the first spring 719. The movable frame 718 moves and separates from the bottom float 5. At the same time, the movement of the movable frame 718 drives the spur gear 720 to rotate. The rotation of the spur gear 720 drives the baffle 721 to move. The movement of the baffle 721 supports the upper float 5, so that the bottom float 5 falls into the inner cavity of the transparent PTFE liner tube 4.

[0054] Please refer to this carefully. Figures 7 to 9 The welding mechanism 8 includes a mounting frame 801, which is fixedly connected to the end of the assembly table 6 away from the support base 709. A hydraulic cylinder 802 is mounted on the outer wall of the mounting frame 801. The output end of the hydraulic cylinder 802 is connected to a movable seat 803. A fifth motor 804 is mounted on the top of the movable seat 803. The output end of the fifth motor 804 is connected to a third threaded rod 805. A displacement frame 806 is symmetrically slidably connected inside the movable seat 803. A welding torch 807 is mounted on one end of the displacement frame 806. The third threaded rod 805 passes through the displacement frame 806. Mounting bases 808 are symmetrically fixedly connected to both ends of the mounting frame 801. Each of the mounting bases 808 has a sliding groove 809 on one side that is close to the other. A limit plate 810 is fixedly connected to the outer wall of the mounting base 808. A locking block 811 extending into the inner cavity of the sliding groove 809 is slidably connected inside the mounting base 808. A second spring 812 is connected between the locking block 811 and the mounting base 808. A pusher 813 is slidably connected inside the mounting bracket 801 and the mounting base 808. The pusher 813 passes through the locking block 811. A push plate 815 is fixedly connected to one end of the pusher 813. The other end of the pusher 813 extends out of the mounting bracket 801. A third spring 814 is connected between the pusher 813 and the mounting bracket 801.

[0055] In this embodiment: the two end flanges 2 are respectively moved into the two slide grooves 809. The end flanges 2 come into contact with the locking block 811, pushing the locking block 811 to move and squeezing the second spring 812. When the end flanges 2 are separated from the locking block 811, the locking block 811 is reset by the elastic force of the second spring 812. At this time, the locking block 811 and the limiting plate 810 together position the end flanges 2 at one end of the slide groove 809.

[0056] The steel pipe 1 is moved between the two end flanges 2. The hydraulic cylinder 802 rotates, causing the movable seat 803 to move. The displacement of the movable seat 803 drives the welding torch 807 to move via the displacement frame 806. The fifth motor 804 rotates, causing the third threaded rod 805 to rotate. The rotation of the third threaded rod 805 drives the two displacement frames 806 to move in opposite directions. The displacement of the displacement frames 806 drives the welding torch 807 to move. The two welding torches 807 contact the two end flanges 2 respectively. At the same time, the third motor 708 is started to drive the steel pipe 1. The pipe 1 is rotated, thereby welding the two end flanges 2 onto the steel pipe 1. Then, the clamping of the steel pipe 1 is released, and the movable seat 803 moves in the opposite direction. The movable seat 803 moves and contacts the push frame 813, pushing the push frame 813 to move, which compresses the third spring 814. The displacement of the push frame 813 pushes the locking block 811 to move through the push plate 815, canceling the positioning of the end flanges 2. Thus, the steel pipe 1 and the end flanges 2 can slide out along the slide groove 809, completing the assembly of the float-type level gauge.

[0057] The assembly process of the float-type level gauge of the present invention is as follows: The steel pipe 1 is moved to the top of the assembly platform 6 and positioned between two clamping plates 706. The transparent PTFE liner tube 4 is inserted into the insertion hole 715, so that the bottom end of the transparent PTFE liner tube 4 contacts the top end of the insertion rod 714. The float 5 is placed into the vertical groove 717, and the two end flanges 2 are respectively positioned in the two sliding grooves 809. After clamping the steel pipe 1, it is moved above the transparent PTFE liner tube 4. The displacement plate 713 and the insertion rod 714 push the transparent PTFE liner tube 4 into the steel pipe 1. Then, the steel pipe 1 moves to the bottom of the vertical groove 717, and a float 5 automatically falls into the transparent PTFE liner tube 4. The steel pipe 1 is then moved between the two end flanges 2, and the welding torch 807 performs welding operations between the steel pipe 1 and the end flanges 2. The improved assembly mechanism 7 facilitates the automatic assembly and welding of the float-type level gauge. It should be noted that the insertion hole 715, the vertical groove 717 and the sliding groove 809 are located on the trajectory of the circular motion of the steel pipe 1. By swinging the steel pipe 1 to the corresponding position, the corresponding operation can be achieved, making the equipment highly integrated and eliminating the need for multiple transfers and disassembly clamping, which can effectively improve the efficiency and quality of operation.

[0058] Please refer to this carefully. Figures 3 to 6The outer wall of the clamping plate 706 is in contact with the inner wall of the rotating frame 703. The outer wall of the clamping plate 706 is provided with a first threaded hole. The outer wall of the first threaded rod 705 is symmetrically provided with a first external thread, and the first external thread matches the first threaded hole.

[0059] In this embodiment: the second motor 704 drives the first threaded rod 705 to rotate, the rotation of the first threaded rod 705 drives the two clamping plates 706 to move in opposite directions, the displacement of the clamping plates 706 drives the rotating wheels 707 to move, and the four rotating wheels 707 perform clamping and positioning operations on the steel pipe 1.

[0060] Please refer to this carefully. Figures 3 to 6 The inner wall of the insertion hole 715 fits against the outer wall of the insertion rod 714. The outer wall of the displacement plate 713 is provided with a second threaded hole, which matches the second threaded rod 712. The outer wall of the transparent PTFE inner liner tube 4 fits against the inner wall of the insertion hole 715.

[0061] In this embodiment: the fourth motor 711 drives the second threaded rod 712 to rotate, the rotation of the second threaded rod 712 drives the displacement plate 713 to move, the displacement plate 713 pushes the insertion rod 714 to move, the displacement of the insertion rod 714 pushes the transparent PTFE inner liner tube 4 into the steel pipe 1 until the insertion rod 714 is fully inserted into the insertion hole 715, so that the transparent PTFE inner liner tube 4 is fully inserted into the steel pipe 1.

[0062] Please refer to this carefully. Figures 3 to 6 The top of the movable frame 718 and the bottom of the baffle 721 are both provided with toothed grooves, which mesh with the spur gear 720. The end of the movable frame 718 that extends out of the fixed frame 716 is provided with a semi-circular surface.

[0063] In this embodiment: the steel pipe 1 moves to the bottom of the vertical groove 717. At this time, the steel pipe 1 comes into contact with the movable frame 718, pushing the movable frame 718 to move and squeezing the first spring 719. The movable frame 718 moves and separates from the bottommost float 5. At the same time, the movement of the movable frame 718 drives the spur gear 720 to rotate. The rotation of the spur gear 720 drives the baffle 721 to move.

[0064] Please refer to this carefully. Figures 7 to 9 The outer wall of the displacement frame 806 is provided with a third threaded hole, and the outer wall of the third threaded rod 805 is symmetrically provided with a second external thread, which matches the third threaded hole.

[0065] In this embodiment: the hydraulic cylinder 802 operates to drive the movable seat 803 to move, and the displacement of the movable seat 803 drives the welding torch 807 to move through the displacement frame 806; the fifth motor 804 operates to drive the third threaded rod 805 to rotate, and the rotation of the third threaded rod 805 drives the two displacement frames 806 to move in opposite directions, and the displacement of the displacement frames 806 drives the welding torch 807 to move.

[0066] Please refer to this carefully. Figures 7 to 9 The inner wall of one end of the slide 809 is in contact with the outer wall of the end flange 2. The end of the locking block 811 extending into the inner cavity of the slide 809 is provided with a first inclined surface, and a second inclined surface is provided on one side of the locking block 811. The push plate 815 is in contact with the second inclined surface.

[0067] In this embodiment: the two end flanges 2 are moved into the two slide grooves 809 respectively, and the end flanges 2 contact the first inclined surface of the locking block 811, pushing the locking block 811 to move and compressing the second spring 812. When the end flanges 2 are separated from the locking block 811, the locking block 811 is reset by the elastic force of the second spring 812. At this time, the locking block 811 and the limiting plate 810 together position the end flanges 2 at one end of the slide groove 809; the movable seat 803 moves in the opposite direction, and the movable seat 803 contacts the push frame 813 to push the push frame 813 to move, compressing the third spring 814. The displacement of the push frame 813 pushes the second inclined surface of the locking block 811 through the push plate 815 to move it.

Claims

1. A manufacturing process for a float-type liquid level gauge, characterized in that, The specific steps are as follows: Step 1: Preparation and processing; Select carbon steel or stainless steel that meets the pressure vessel connection standard as the outer steel pipe (1). The length of the steel pipe (1) is customized according to the preset size. Use wire cutting or milling process to open longitudinal strip observation grooves (3) on the front and back sides of the steel pipe (1). Step 2: Inner liner forming; Cut the transparent PTFE inner liner (4) to the preset size to ensure that its inner wall is smooth and highly transparent; Step 3: Assembly; Using the assembly equipment, insert the transparent PTFE inner liner tube (4) into the steel pipe (1), put the float (5) into the transparent PTFE inner liner tube (4), and weld end flanges (2) at both ends of the steel pipe (1). Step 4: Testing; After assembly, conduct a simulated liquid level test: inject clean water and observe whether the float (5) can move freely up and down throughout the process and clearly identify its position from a distance. Once it is confirmed that there is no jamming or leakage, the finished product can be obtained. The assembly equipment in step three includes an assembly platform (6). The float-type level gauge is assembled on the assembly platform (6) using an assembly mechanism (7). The end flanges (2) are welded to both ends of the steel pipe (1) via a welding mechanism (8). The assembly mechanism (7) includes a first motor (701), which is mounted at the bottom of the assembly platform (6). The output end of the first motor (701) is connected to a rotating shaft (702). A rotating frame (703) is fixedly connected to the top of the rotating shaft (702). A second motor (704) is installed on one side of the rotating frame (703). The output end of the second motor (704) is connected to a first threaded rod (705). The inner wall of the rotating frame (703) is symmetrically connected to a clamping plate (706). The first threaded rod (705) passes through the two clamping plates (706). The outer wall of the clamping plate (706) is rotatably connected to two rotating wheels (707). A third motor (708) is installed at the bottom of one of the clamping plates (706). The output end of the third motor (708) is connected to the rotating wheel (707). The assembly mechanism (7) also includes a support base (709). One end of the assembly platform (6) is fixedly connected to the support base (709). The top end of the support base (709) is fixedly connected to a positioning frame (710). A displacement plate (713) is slidably connected to the outer wall of the support base (709). A plug rod (714) is fixedly connected to the top end of the displacement plate (713). A fourth motor (711) is installed on the top end of the assembly platform (6). The output end of the fourth motor (711) is connected to a second threaded rod (712). The second threaded rod (712) passes through the displacement plate (713). A plug hole (715) is opened on the top end of the assembly platform (6) above the plug rod (714). (6) is fixedly connected to one side of a fixed frame (716), the top of the fixed frame (716) is provided with a vertical groove (717), the inside of the fixed frame (716) is slidably connected to a movable frame (718), a first spring (719) is connected between the movable frame (718) and the fixed frame (716), one end of the movable frame (718) extends into the inner cavity of the vertical groove (717), the other end of the movable frame (718) extends out of the fixed frame (716), the inside of the fixed frame (716) is rotatably connected to the top of the movable frame (718) and a baffle (721) is slidably connected to the top of the spur gear (720) inside the fixed frame (716). The welding mechanism (8) includes a mounting frame (801), which is fixedly connected to the end of the assembly table (6) away from the support base (709). A hydraulic cylinder (802) is mounted on the outer wall of the mounting frame (801). The output end of the hydraulic cylinder (802) is connected to a movable seat (803). A fifth motor (804) is mounted on the top of the movable seat (803). The output end of the fifth motor (804) is connected to a third threaded rod (805). A displacement frame (806) is symmetrically slidably connected inside the movable seat (803). A welding torch (807) is mounted on one end of the displacement frame (806). The third threaded rod (805) passes through the displacement frame (806). Mounting bases (808) are symmetrically fixedly connected to both ends of the mounting frame (801). Each of the mounting bases (808) has a sliding groove (809) on one side that is close to the other. A limit plate (810) is fixedly connected to the outer wall of the mounting base (808). A locking block (811) extending into the inner cavity of the sliding groove (809) is slidably connected inside the mounting base (808). A second spring (812) is connected between the locking block (811) and the mounting base (808). A pusher (813) is slidably connected inside the mounting frame (801) and the mounting base (808). The pusher (813) passes through the locking block (811). A push plate (815) is fixedly connected to one end of the pusher (813). The other end of the pusher (813) extends out of the mounting frame (801). A third spring (814) is connected between the pusher (813) and the mounting frame (801). The float-type level gauge includes a steel pipe (1), with end flanges (2) fixedly connected to the top and bottom of the steel pipe (1), and strip-shaped observation grooves (3) opened on the front and rear sides of the steel pipe (1). A transparent PTFE inner liner (4) is sleeved on the inner wall of the steel pipe (1), and a float (5) is slidably connected to the inner wall of the transparent PTFE inner liner (4). Level scales are set on the side wall of the steel pipe (1) near the strip-shaped observation groove (3) or on the transparent PTFE inner liner (4) inside the strip-shaped observation groove (3). The assembly process of the float-type level gauge is as follows: Move the steel pipe to the top of the assembly platform and position it between two clamping plates. Insert the transparent PTFE liner into the insertion hole so that the bottom end of the transparent PTFE liner contacts the top end of the insertion rod. Place the float into the vertical groove and position the two end flanges in the two sliding grooves respectively. After clamping the steel pipe, move it above the transparent PTFE liner. The displacement plate and the insertion rod push the transparent PTFE liner into the steel pipe. Then, move the steel pipe to the bottom of the vertical groove, and a float automatically falls into the transparent PTFE liner. The steel pipe is then moved between the two end flanges, and the welding torch is used to weld the steel pipe and the end flanges.

2. The manufacturing process of the float-type level gauge according to claim 1, characterized in that, The outer wall of the clamping plate (706) is in contact with the inner wall of the rotating frame (703). The outer wall of the clamping plate (706) is provided with a first threaded hole. The outer wall of the first threaded rod (705) is symmetrically provided with a first external thread, and the external thread matches the first threaded hole.

3. The manufacturing process of the float-type level gauge according to claim 1, characterized in that, The inner wall of the insertion hole (715) is in contact with the outer wall of the insertion rod (714), the outer wall of the displacement plate (713) is provided with a second threaded hole, the second threaded hole is matched with the second threaded rod (712), and the outer wall of the transparent PTFE inner liner tube (4) is in contact with the inner wall of the insertion hole (715).

4. The manufacturing process of the float-type level gauge according to claim 1, characterized in that, The top of the movable frame (718) and the bottom of the baffle (721) are both provided with toothed grooves, which mesh with the spur gear (720). The movable frame (718) extending out of the fixed frame (716) is provided with a semi-circular surface.

5. The manufacturing process of the float-type level gauge according to claim 1, characterized in that, The outer wall of the displacement frame (806) is provided with a third threaded hole, and the outer wall of the third threaded rod (805) is symmetrically provided with a second external thread, which matches the third threaded hole.

6. The manufacturing process of the float-type level gauge according to claim 1, characterized in that, The inner wall of one end of the slide (809) is in contact with the outer wall of the end flange (2). The end of the locking block (811) extending into the inner cavity of the slide (809) is provided with a first inclined surface. The side of the locking block (811) is provided with a second inclined surface. The push plate (815) is in contact with the second inclined surface.

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